Draft-rigging.



yPATBBNTED NOV. 29, 1904.

v No. 776,202.

0. S. PULLIAM. DRAFT RIGGING.

APPLICATION FILED APP.. 18. 1904.

N0 MODEL.

. OSVALD S. PULLIAM, OF ST. LOUIS,

fleuren @raras Patented November ae, ieee.

Parent @einen MISSUURI, ASSIGNOR TO COME/ION- SPECIFECATION forming partof Letters Patent No.

776,202, dated November 29, 1904.

Application filed April 18, 190.4. Serial lilo. 203,670. (No model.)

To all whom t may concern."

Be it known that I, DSWALD S. Penman, a citizen of the United States,residing in the city of St. Louis, in the State of Missourh haveinvented certain new and useful Improvements in Draft-Rigging, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings, forming part of this specification. A

y invention relates to an improvement in draft-rigging for railway-cars,the construction embodying one in which the impact of the draw-head ofthe rigging in its inward movement is contracted by both a spring andfric-tional engagement of members'in the rigging in such manner thatlthe necessary action of the spring operates in conjunction withfriction to lessen the degree of spring action in overcoming in ayielding manner the thrust of the draw-head.

Figure I is a top or plan view of my rigging. Fig. l1 is a longitudinalvertical section taken on line 1I H, Fig. i. Fig. HI is a perspectiveView of the forward friction member of the rigging. Fig. IV is a frontpern spective vView of the rear friction member. Fig. V is a rearperspective View of the rear friction member. Fig'. VI is a perspectiveview of the springbox. Fig. VHisan enlarged view showing a fragment ofthe inner grooved face of the rearfriction member.

1 designates the draft-timbers of a railwaycar, yand 2 the car end sillby which the drawbar of the rigging is supported; v

3 designates the draw-bar, to which is connected a yoke or strap 4, thatextends rearwardlyfrom the inner end of the draw-bar, the said yokebeing secured to the top and bottom ofthe draw-bar by suitable means,

s'uch as rivets 5.

6 designates guide-.plates secured to the inner opposing faces of thedraft-timbers 1 and provided with vertical lugs 7.

8 designates a spring-box having at .its rear end a head 9, that isprovided with notches 10 (see Fig. Vl) to receive the arms of the yoke4, within which the box is seated. lhis box is provided at its forwardend with a plurality of studs 1l, projecting from the perimsaidvfrictionmember from rotation.

eter of the box, and the box being hollow Ithroughout its mainv portionprovides aseat for a bumperespring 12, thatrests at its rear end againstthe forward side of the box-head; as seen in Fig. H.

13 designates a forward friction member 55 thatlis provided with notches14C, that receive the arms of the yoke 4, which serve to hold At therear side of this friction member are aseries of inclined projections15. n

16 designates a rear friction member that at its forward end is providedwith a series of inclined projections 17, correspondingfto theprojections 15 of the forward friction member and adapted to bearthereagainst The friction member 16 is tubular in form and is providedwith a forward end wall 18, against which the forward end of thebumper-spring 12 rests. interior of the friction member 16 are aplurality of ribs 19, between which are located longitudinally-extendinggrooves 20, in which the studs 11 of the spring-box 8 opcrate. The ribsand grooves extend in straight lines for portions of their lengths,beginning at the rear end of the friction member, and at their forwardends they are curved laterally.

' In the service of my draft-rigging the parts occupy the positionsillustratedlmost clearly in Fig. L the head of the spring-box 8 restingSe within the yoke 4 and bearing against the rearrnost lugs 7 of the'plates 6 and the forward friction member resting within the yoke 4 andagainst the forward plate-lugs 7. When in* ward pressure is imparted tothe draw-head 3, ,85 the bumper-spring -12 first receives the rearwardthrust of the draw-head and yieldingly resists its movement due to thetravel of the yoke@v and the friction members 13 and 16. therewithin.During this period of travel of the parts' named the studs 11 of thespringbo'X ride in the straight portions of the grooves 20 in the rearfriction member until they finally reach the curved portions of saidgrooves. When the curved portions of the -l groovesare reached by saidstuds and the studs begin to travel thereln, a rotative moe tion isimparted to the rear friction member,

which is thereby caused to turn with respect to the forwardnon-rotatable friction member. As the rear friction member is thusturned its inclined projections ride against the inclined projections l5of the forwardfriction member, thereby incurring a sufficient degree of'friction between the projections of said members to'yieldingly resistthe inward thrust 'of the draw-bar to enhance the yielding resistancethereagainst over that provided for by the bumper-spring.

l claim as my invention- 1. In a draft-rigging, the combination of -a-draw-head, a spring-seat member carried b y said draw-head, studsprojecting from said member, a rotatable friction member provided withinterior grooves partially curved and by which said studs are received,a non-rotatable friction member carried by said draw-head and opposingsaid vrotatable friction member, and a spring interposed between saidspringseat member and rotatable friction member, substantially as setforth.

2. In a draft-rigging, the combination ofa 2.5

draw#liead, a yoke carried by said draw-head a spring-box non-rotatablyheld in said yoke, studs projecting from `said box, friction memberhaving interior grooves partially curved and by which said studs arereceived, a non-rotatable friction member held a rotatable.v

within said yoke, and opposing said rotatable

